adenomatoid tumor


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adenomatoid tumor

[‚ad·ən′ä·mə‚tȯid ′tü·mər]
(medicine)
A benign genital-tract tumor composed of stroma whose spaces are lined by cells that resemble epithelium, endothelium, and mesothelium.
References in periodicals archive ?
We report a case of epididymal adenomatoid tumor diagnosed on aspiration cytology, which was confirmed on histopathology and immunohistochemistry.
The gross appearance of adenomatoid tumor is a circumscribed, sometimes cystic nodule.
An adenomatoid tumor is a benign mesothelial neoplasm, which usually presents as a solitary or multinodular, small, indurate mass or swelling located at the uterine cornu.
3) Surgical exploration is however, required to exclude malignancy, since the accessory spleen that is attached to the testicle may be misinterpreted as a primary, malignant testicular tumor or an adenomatoid tumor.
Intraparenchymatous adenomatoid tumor dependent on the rete testis: a case report and review of literature.
Absence of gland-like spaces and tubule and cord formation with nonreactivity to keratin, WT1, and calretinin precluded the diagnosis of a benign adenomatoid tumor.
The pathological differential diagnosis includes endometriosis, endosalpingiosis, benign reactive mesothelial proliferations such as adenomatoid tumor or florid mesothelial hyperplasia, and borderline mesothelial proliferations with similar histological features, which include benign or well-differentiated papillary mesothelioma (Table 1).
Benign Adenomatoid tumor Benign multicystic mesothelioma (multilocular peritoneal inclusion cyst) Mesothelial cyst(s) (unilocular) (free or attached) Well-differentiated papillary mesothelioma Solitary fibrous tumor (fibrous mesothelioma) Malignant Diffuse malignant mesothelioma Epithelial type Sarcomatous type Biphasic type Undifferentiated Rare types(*) Serous tumor of borderline malignancy (of low malignant potential)([dagger])[1,2] Serous carcinoma([double dagger])[3-5] Malignant tumors of other mullerian types Desmoplastic small round cell tumor Soft tissue-type tumors (*) Rare types include desmoplastic, small cell, lympho-histiocytoid, and deciduoid types.
1-3) Lipoma, adenomatoid tumor, angiomyxoma, papillary cystadenoma, and leiomyoma are the most commonly occurring benign neoplasms of the spermatic cord.
7,8] Clinical diagnoses were epididymitis in 3 cases, testicular neoplasm in 1 case, adenomatoid tumor in 1 case, and unknown in 1 case.
The clinical differential diagnosis of an epididymal tumor includes tuberculosis, spermatic granuloma, adenomatoid tumor (the most common tumor in this location), mesothelioma, papillary cystadenoma (especially if the patient has a family history of von Hippel-Lindau disease), and embryonal rhabdomyosarcoma.
Adenomatoid tumors are the most common epididymal tumors; they comprise about 30% of paratesticular neoplasms.